Abstract
Electromagnetic joining technology is an effective technique to join tubes with dissimilar materials. In this paper, a new approach for steel/Al tube parts joined by electromagnetic crimping using a flat coil was investigated. Electromagnetic crimping process experiments with different discharge energies (12, 14, and 16 kJ) and property tests were carried out. Meanwhile, the deformation characteristics of the outer tube under different discharging energies were discussed to study the fittability of the joining zone. The quality of the crimped joint was analyzed by microstructure characterization. The results show that the proposed approach was able to obtain torque joints and was potentially for tubular parts manufacturing. Moreover, higher discharging energy would result in better fittability degree and torque strength but might cause some cracks in the necking area. Combining the results of torsion tests with the microstructure observation, the comprehensive performance of the joint formed under a moderate discharge energy (14 kJ) was optimal.
Highlights
Introduction on Electromagnetic Force by FlatCoil.Reducing vehicle weight can effectively improve the mileage of new energy vehicles.A direct and efficient way to reach the target of lightweight design is the substitution of lowdensity but high-strength materials like aluminum, magnesium, fiber-reinforced composite materials for steel [1,2,3]
Three repeated samples were tested at each discharge energy
Magnetic pulse crimping using a flat coil could be applicable for torque joints, which is a potentially convenient and flexible method to manufacture tubular components
Summary
Introduction on Electromagnetic Force by FlatCoil.Reducing vehicle weight can effectively improve the mileage of new energy vehicles.A direct and efficient way to reach the target of lightweight design is the substitution of lowdensity but high-strength materials like aluminum, magnesium, fiber-reinforced composite materials for steel [1,2,3]. Reducing vehicle weight can effectively improve the mileage of new energy vehicles. A direct and efficient way to reach the target of lightweight design is the substitution of lowdensity but high-strength materials like aluminum, magnesium, fiber-reinforced composite materials for steel [1,2,3]. One innovative concept of lightweight designs is so-called smart structures, in the manufacturing of which is often required to join tubes with different materials. The joining of parts in different materials is a challenging task. Some conventional joining techniques are not suitable for making high-quality joints [4,5,6]. Many researchers have focused on searching for new methods
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